Apparatus for concentrating liquids.



U. ROSS].

APPARATUS FOR CONCENTRATING LIQUIDS.

APPLICATION FILED JUNE 3. 19]].

Patented Sept. 7, 1915.

2 SHEETSSHEET 1.

rimwllllli Witnesses:

U. ROSSI.

APPARATUS FOR CONCENTRATING LIQUIDS.

APPLICATION FILED JUNE 3. 1911.

1,152,977. 1 A Patntedse m, 1915.

2 SHEETSSHEET 2.

To all whom it may concern i Ueo ROSSI, OF-MILAN, ITALY.

' nrrnnnrus roncoNcENTnA'rme LIQUIDS.

Specification of Letters Patent.

Patented Sept. 7, 1915.

Application filed June 3, 1911. Serial No. 631,057.

Be it known that I, Dr..Ueo Rossr, a sub ject of the King of Italy, residing at 11 Via Panizza, vMilan, in the Kingdom of Italy, have invented certain new and useful Improvements in Apparatus for Concentrating Liquids, of which the-following 1s a specification.

The present invention has for its object 5 a tubular evaporation apparatus for concentrating liquids which is able to operate freely at atmospheric pressure or at a reduced pressure on fitting to it a suitable suction pump or a barometric condenser or both simultaneously in lowering the temperature to 50 or 55 degrees.

A constructional form of the apparatus is illustrated by way of example in the ac-' companying drawings, in which Fi re 1 shows an element in sectlon.

Fig. 2 shows the same. in plan. Fig. 3 is aside elevation. Fig. 4c shows the method of raising the liquid inan elementary tube. Fig. 5 shows a helicaldevice arranged at the bottom of each elementary tube. Fig. 6 is ageneral view. Fig. 7 is aplan corresponding to Fig. 6.-

The apparatus consists broadly of a nest of tubes D bent at the lower part in such a manner that their orifices are located on one and the same horizontal plane in a chamber; B. inclosed in a steam chamber L and headed at both ends into two plates P P; the curvature of the tubes enables them to expand freely.

The liquid that it is desired to evaporate v enters the chamber B; S is a divider of the cyclone type'intended for completely sepa v ratingthe vapor from the jets of liquid and the foam carried along with it.

The liquid to be concentrated enters the chamber B from which it ascends to the dealong with it theliquid which it spreads in a small uniform layer over the entire surface of the'tube. In proportion as it ascends'the evaporation increases because the temperature of the heating vaporis greater as is also the velocity of the vapor whichissues violently from the upper apertures of .the tubes and is mixed'with small drops of the condensed liquid.

It is necessary to separate the pulverized liquid from the vapor and this is effected in the divider S; the vapor enters the latter tangentially and-assumes a very rapid rotatory movement around the central cone 0,

the drops and the foam becoming united under the. influence of centrifugal force against the walls of the inclosing cylinder and the'steam while continuing to rotate as indicated by the arrow issues through the central diaphragm at G in the same manner as in the cyclones which serve to. separate dust from atmospheric air.

In order to guarantee the uniformity of the layer and of the travel of the liquid to be evaporated in the inner wall of the nest of tubes a helical guide is fixed at their lower-orifice (Fig. 5) and serves to impart a rotatory movement to the liquid which then ascends in large spirals (Fig. 4) along the inner walls at the tubes.

Several evaporating elements can be connected one with the other in sucha manner that the vapor issuing from the first serves as heating vapor for the second the vapor from the second for heating the third until the latter condenses its vapor in vacuo.

In Fig. 6 where 0: is the barometric condenser, (5 the tube supplying the condensation Water the vacuum and 8 the steam supply tube three elements I, II, vIII are shown combined to form a triple-acting evaporation system.

Inthe drawing it will be noticed that the concentrated liquid of the first element passes through the tube A to the second element and the concentrated liquid of the second element passes through the tube A to the third element so that a continuous circulation is obtained to the outlet from which the liquid issues concentrated to the desired degree. In this manner a continuous concentration is obtained in a. single passage through the apparatus.

as I As shown in Fig. 6 the exhaust vapor can be utilized at T for heating the liquid which is to undergo the desired concentration this being efl'ected by means of heating chambers R communicating one with the other by means of tubes Z and with the first nest of tubes by means of the first length of tube T.

The present inventionis intended to comprise every modification relating to the con- 2 struction and the arrangements that could curved lower ends of the tubes opening m the same horizontal plane into said liquid chamber so as to permit of a uniform feed of the liquid and also the expansion of the tubes, a casing containing the said tubes, means for conducting steam through the said casing to heat the liquid contained.

within the said chamber and the lower ends of said tubes, means in communication with the upper ends ofthe said tubes for separating the pulverized liquid from the steam as the same escapes from the tubes, means for leading oflf the dry steam from the said sepa rating means and means for collecting the concentrated liquid.

2. A tubular evaporation apparatus for concentrating liquids. comprising in combination a chamber containing the liquid to be evaporated, a plurality of inclined tubes curved at their lower ends only, the said curved lower ends of the tubes opening in the same horizontal plane into the said liquid chamber so as to permit of a uniform feed of the liquid and also the expansion. f

of the tubes, a short curved helical bafile separating means,

orator in series with the,

plate disposed with the lower curved ends. imparting a rota- 1 of each of the tubes, for torymovement to the liquid as it ascends within the tubes, a casing containing the said tubes, means for conducting steam through the said casing to heat the liquid contained within the said chamber and'the lower endsof said tubes, meansfor sepa- 7 rating the pulverized liquid from the steam as the same escapes from thetubes, means for leading off the dig steam from the said an {means forcollecting and leading away theconcentrated liquid.

- 3. In an evaporator system, each evapora= tor comprising a cylindrical'casing contain ing inclined nests of tubes headed into'upper and lower plates, the lower ends of said tubes being bent so as to open at the level into a chamber for containing 'the liquid to be evaporated, means for circulating a p, heating vapor through said casing and around said tubes, a separator arranged at steam from the interior of said hollow cone ,and means to the cylindrical casing-of a second evapconnected to the base of saids'eparator for conducting liquid and foam particles to the liquid chamber at'the base of the cylindrical casing of the'said second evaporator.

in presence of two witnesses.

. UGO ROSSI. Witnesses: CHARLEs C. Bnor,

B. Canto SALVATOR.

the upper end of saiditubes and in commu- In testimony whereof I aflix my signature 1 

